People in Shinjuku, Tokyo, keep disappearing without warning in a string of mysterious incidents. Win Kirifuda woke up in the city six months ago with every memory gone. He has since started going to high school and working a part-time job he picked up on a whim, but he cannot fit in at either. Frustrated, he passes his nights in the park with classmates such as Niika. That routine changes when Crysta, a mysterious transfer student, shows up saying she knows everything about Win and that the two of them are engaged. Something suspicious lurks behind her, though. Over four episodes, the questions pile up: what lies behind the disappearances, what Crysta is after, and what Win's hidden past holds, as a new story to recover his lost memories begins.